[Assessment of fetal maturity in high risk pregnancies: analysis according to gestational age].

Background: To study, in high risk pregnancies, the results of fetal maturity evaluation, and analyze the perinatal results.

Methods: Between July 1998 and August 1999, 180 amniocentesis were performed at the Fetal Surveillance Unit to assess fetal maturity. The amniotic fluid exams included Shake Test and orange cells counting.